Nissens 999221 A/C Expansion Valve

Reliable A/C Expansion Valve for BMW Models

The Nissens A/C Expansion Valve 999221 is engineered to regulate refrigerant flow precisely in BMW vehicles. Designed specifically for select BMW 1 Series, 3 Series, M3, and X Series models, this aluminum block-type valve ensures efficient air conditioning system performance using R134a refrigerant.

Key Features of Nissens A/C Expansion Valve 999221

• Constructed from durable aluminum for corrosion resistance and longevity
• Compatible with R134a refrigerant systems
• Block-type design for consistent refrigerant flow control
• Includes 4 O-rings to ensure a secure, leak-free seal
• Liquid inlet fitting thread diameter: 0.5500 inches
• Liquid outlet fitting thread diameter: 0.5900 inches
• Suction inlet and outlet fitting thread diameter: 0.7100 inches

Detailed Product Description

The Nissens A/C Expansion Valve 999221 is a precision component designed to maintain optimal refrigerant flow within the HVAC system of compatible BMW vehicles. Its aluminum construction offers strength and resistance to corrosion, which is critical for the longevity of the valve under varying temperature and pressure conditions. The block-type valve design provides reliable metering of refrigerant, ensuring the air conditioning system operates efficiently with R134a refrigerant. The inclusion of four O-rings helps maintain a tight seal at connection points, reducing the risk of leaks. Thread diameters for liquid and suction fittings are specified to match OEM standards, facilitating proper fitment and function.

Compatible BMW Models and Common Applications

• BMW 1 Series M, 128i, 135i
• BMW 3 Series: 325i, 325xi, 328i, 328i xDrive, 328xi, 330xi, 335d, 335i, 335is, 335i xDrive, 335xi
• BMW M3
• BMW X Series: X1, X3, X4

This expansion valve is used to address issues such as:

• Inconsistent or insufficient cooling performance
• Refrigerant leaks at the expansion valve connections
• HVAC system pressure irregularities
• Reduced airflow due to improper refrigerant metering
• Corrosion-related valve failure

Installation Notes and Tips

Ensure the HVAC system is fully evacuated and free of contaminants before installing the Nissens A/C Expansion Valve 999221. Verify thread diameters and O-ring placement to prevent leaks. Since mounting hardware is not included, reuse OEM hardware or source compatible fasteners. Proper torque specifications should be followed to avoid damage to fittings or valve body.

Quality Assurance and Warranty

Nissens manufactures this A/C expansion valve to meet OEM quality standards, ensuring reliable performance and durability. The product includes O-rings to maintain system integrity. Please consult the warranty terms provided by Nissens or the distributor for coverage details.